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Defining Entity Relationships
Official Documentation
Defining Entity Relationships Relationships between database entities or Java objects are necessary for most applications. Take Liferay's Message Boards application as an example. Each Message...
Defining Entity Finder Methods
Official Documentation
Defining Entity Finder Methods Finder methods retrieve entity objects from the database based on specified parameters. For each finder defined, Service Builder generates several methods to fetch,...
Modifying Database Fields in Development
Official Documentation
Modifying Database Fields in Development As you develop an application, you might need to add fields to your database. This is a normal process of iterative development: you get an idea for a new...
Sorting Entity Instances
Official Documentation
Sorting Entity Instances Often, you want to retrieve multiple instances of a given entity and list them in a particular order. The service.xml file lets you specify the default order of your...
Service Builder Basics
Official Documentation
Service Builder Basics Using Service Builder helps you learn it. You'll use it to learn the basics: Generating Model, Persistence, and Service Code: Define a basic model, generate code from it,...
Generating Model, Persistence, and Service Code
Official Documentation
Generating Model, Persistence, and Service Code Service Builder makes it easy to define models and generate model, persistence, and service code for them. You'll experience this by defining a model...
Data Scopes
Official Documentation
Data Scopes
Advanced Queries
Official Documentation
Advanced Queries Service Builder doesn't limit you to elements in service.xml. If simple finders aren't sufficient for getting data out of your application, there are three other ways to make the...
Expando
Official Documentation
Expando Accessing Custom Fields with Expando
Using Dynamic Query
Using Dynamic Query Liferay's Dynamic Query API wraps Hibernate's Criteria API. It helps you think in terms of objects and member variables instead of tables and columns. Complex queries can be...
Defining Entity Columns
Official Documentation
Defining Entity Columns An entity's columns represent its attributes. These attributes map table fields to Java object fields. Here you'll examine the sample project from Understanding and...
Invoking a Service Locally
Official Documentation
Invoking a Service Locally Service Builder services that are deployed to DXP/Portal can be invoked from other classes in the same JVM. These services are local to the classes. Service Builder...
Upgrading Data Schemas
Official Documentation
Upgrading Data Schemas When you upgrade Liferay, you might run into incompatibility issues with your custom modules' data schemas. There are three ways you can resolve these issues: You can run...
Multithreading Process
Official Documentation
Multithreading Process Liferay DXP 7.4 U10+ or Liferay Portal 7.4 GA14+ Your Upgrade Processes may involve making complex changes to large data sets. If performance is critical, use the...
Liferay Faces Alloy
Official Documentation
Liferay Faces Alloy Liferay Faces Alloy is distributed in a .jar file. You can add Liferay Faces Alloy as a dependency to your portlet projects, to use AlloyUI in a way that is consistent with JSF...
Reference
Official Documentation
Reference
CDI Portlet Predefined Beans
Official Documentation
CDI Portlet Predefined Beans Liferay DXP provides injectable portlet artifacts for CDI called Portlet Predefined Beans, as specified by JSR 362. There are two types of predefined beans: Portlet...
Reference
Official Documentation
Reference
Using JSF
Official Documentation
Using JSF Liferay Faces is an umbrella project that provides support for the JavaServer[™] Faces (JSF) standard in Liferay DXP/Portal. Here are the Liferay Faces topics: Reference facilitates...
Portlet Preferences
Official Documentation
Portlet Preferences You can give administrators and users a way to customize a portlet with portlet preferences. Portlet preferences can be added to any MVC Portlet to give users a UI to access and...

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